I've been playing games today for the first time in a while. I've just installed a fresh Windows Vista Ultimate 64-bit install and updated everything. I'm using the latest 181.22 nVidia drivers and I switch back and forth between SLI enabled and disabled depending on whether I'm gaming or folding.

I noticed that Crysis locks up almost right away. Warhead does, but takes a little longer. I've been playing FEAR and it can go for maybe 30-45 minutes, then it locks up. I'm running the fans on my GTX 285s at 80% and I think they're staying cool enough. My case airflow isn't great as it's set up for water (the blocks should be here sometime within the next week!).

So any ideas? Should I start trying other drivers?

My cards are not overclocked and my CPU+RAM overclock has passed just about every stress test to my satisfaction and I crunch 24/7.

My cards are not overclocked and my CPU+RAM overclock has passed just about every stress test to my satisfaction and I crunch 24/7.

The system hardlocks. I have to do a hard reset. No bluescreen, but things just stay on whatever game screen freezes. I suppose if it happens again, I'll wait for a while and see what happens. I also get a high pitched squeal in my headphones when this happens.

I've backed the RAM down to 1600 and the CPU to 3.8GHz so let's see what happens. I have been running 3.9GHz (206x19) and 1640MHz RAM 7-8-7-20

If the image remains, chances are it's the gpu, and hence SKY's recommendation.

there's a chance, maybe, that you DX has been corrupted, causing vga memory to not clear itself. You should be abel to confirm this by going back to stock...issues? Re-install DX, but please do this AFTER removing vga drivers...before re0installing vga drivers, update DX, then install vga drivers.

Zlojack, for arguments sake back off your overclock a tad, Cyrsis is pretty sensitive due to its notoriously bad coding and it will crash even on the most stable of overclocks. In my experience this has usually solved the problem and don't worry about a major performance hit, as we all know Crysis doesn't seem to respond much to even the fastest system out there.